1943043632761 has 81 divisors (see below), whose sum is σ = 2549612043279. Its totient is φ = 1475336570400.

The previous prime is 1943043632737. The next prime is 1943043632801. The reversal of 1943043632761 is 1672363403491.

The square root of 1943043632761 is 1393931.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9219648361 + 1933823984400 = 96019^2 + 1390620^2 .

It is not a de Polignac number, because 1943043632761 - 2¹¹ = 1943043630713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (1943043632731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 4615305331 + ... + 4615305751.

Almost surely, 2^{1943043632761} is an apocalyptic number.

1943043632761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1943043632761 is the 1393931-st square number.

1943043632761 is the 696966-th centered octagonal number.

It is an amenable number.

1943043632761 is a deficient number, since it is larger than the sum of its proper divisors (606568410518).

1943043632761 is an frugal number, since it uses more digits than its factorization.

1943043632761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 49.

Multiplying 1943043632761 by its sum of digits (49), we get a square (95209138005289 = 9757517²).

1943043632761 divided by its sum of digits (49) gives a square (39653951689 = 199133²).

The spelling of 1943043632761 in words is "one trillion, nine hundred forty-three billion, forty-three million, six hundred thirty-two thousand, seven hundred sixty-one".